Advances in Amphibious and Marine Seismology

What are the technical challenges in using seismic data to study subduction zones and volcanoes and how can we address them? How do we most effectively use amphibious seismic data?

The use of ocean bottom seismometers (OBS) can improve our understanding of seismic structure and processes in offshore regions; however, using this data requires careful consideration of the effects of the water column above the instrument. My research aims to streamline these correction processes for the ever increasing diversity of locations these instruments are installed, better understand the sources of noise on these instruments, and how to use this data to image the Earth’s lithosphere offshore.

TRM OBS on deck of RV Sikuliaq.

Spectra of OBS before and after tilt and compliance corrections

ROV Jason being hauled onto RV Sikuliaq deck.

Demobilizing an OBS.

Seismogram before and after correction

Grapples away!

Recovering an OBS aboard the R/V Revelle.

Projects

SMART Subsea Cables: Implementing for Geophysics, Early Warning, and Oceans, Vanuatu-New Caledonia to Global

Automated Tilt and Compliance Removal (ATaCR)

Lithospheric and Plate Interface Structure of the Cascadia Subduction Zone

Publications

Janiszewski, H. A., Z. Eilon, J.B. Russell, B. Brunsvik, J.B. Gaherty, S. Mosher, W. Hawley, S. Coats, (2023), Broad-Band Ocean Bottom Seismometer Noise Properties, Geophysical Journal International, ggac450, https://doi.org/10.1093/gji/ggac450

Rowe, C. A., B. M. Howe, M. Fouch, M. Angove, J. Aucan, C. R. Barnes, J. Barros, N. Bailiff, N. C. Becker, F. Carrilho, B. Fry, A. Jamelot, H. A. Janiszewski, L. S. L. Kong, S. Lentz, D. S. Luther, G., Marinaro, L. M. Matias, A. Salaree, A. Sakya, T. Theile, F. J. Tilmann, C. von-Hildebrandt-Andrade, L. Wallace, S. A. Weinstein, W. Wilcock (2022), SMART Cables Observing the Oceans and Earth, Marine Technology Society Journal, 56, 5, pp. 13-25, https://doi.org/10.4031/MTSJ.56.5.3

Howe, B. M.,M. Angove, J. Aucan, C. R. Barnes, J. Barros, N. Bayliff, N. C. Becker, F. Carrilho, M. Fouch, B. Fry, A. Jamelot, H. A. Janiszewski, L. S. Kong, S. Lentz, D. S. Luther, G. Marinaro, L. M. Matias, C. A. Rowe, A. Salaree, A. E. Sakya, T. Thiele, F. Tilmann, C. von Hillebrandt-Andrade, L. Wallace, S. Weinstein, W. Wilcock (2022), SMART Subsea Cables for Observing the Earth and Ocean, Mitigating Environmental Hazards, and Supporting the Blue Economy, Frontiers in Earth Science

Mosher, S. G., Z. Eilon, H. A. Janiszewski, P. Audet (2021), Probabilistic inversion of seafloor compliance for oceanic crustal shear velocity structure using mixture density neural networks, Geophysical Journal International

Janiszewski, H. A., J. B. Gaherty, G. A. Abers, H. Gao, Z. Eilon (2019), Amphibious surface wave phase velocity measurements of the Cascadia subduction zone, Geophysical Journal International.

Janiszewski, H. A., G. A. Abers, (2015) Imaging the plate interface in the Cascadia seismogenic zone: New constraints from offshore receiver functions, Seismological Research Letters.